1. CEC 1980. Firedamp Drainage. Handbook for the Coalmining Industry in the European Community. Verlag Gluckauf, Essen.
2. CEC 1987. Investigation of Firedamp and its Emission from Coal Seams. EUR 11477 EN.
3. Creedy, D. P. 1979. A Study of Variations in Gas Content of Coal Seams in Relation to Petrographic and Stratigraphic Variations. MSc thesis, University College, Cardiff.
4. Seam gas-content database aids firedamp prediction.;The Mining Engineer,,1983
5. Creedy, D. P. 1985. The Origin and Distribution of Firedamp in some British Coalfields. PhD thesis, University College, Cardiff.